CHARGERS:Club is 18-4 (.818) in Dec. under NORV TURNER…QB PHILIP RIVERS had 3 TDs vs. 0 INTs & 107.9 passer rating in last game at Pit. Rivers (27,254) has 2nd-most pass yards in club history, trailing only HOFer DAN FOUTS (43,040). Since ’08, Rivers (20,566) has 2nd-most passing yards in NFL (DREW BREES, 23,227)…RB RONNIE BROWN has career-high 45 rec. in ’12…TE ANTONIO GATES had 9 receptions for 124 yards with 2 TDs in last game at Pit. Gates (80) trails only HOFer LANCE ALWORTH (81) for most TD catches in team history. WR DANARIO ALEXANDER registered 2nd 100-yard rec. game of season last week (102). In past 4, Alexander is averaging 101.5 rec. yards per game with 3 TDs…LB SHAUN PHILLIPS (67) has 2nd-most sacks by Charger (LESLIE O’NEAL, 105.5) since ’82. Has 2.5 sacks & FF in 4 career games vs. Pit…LB DEMORRIO WILLIAMS had 31-yard INT-return TD last week…LB ANTWAN BARNES had season-best 2 sacks last week…STEELERS: Club has won 9 of past 11 in Dec…QB BEN ROETHLISBERGER is 23-9 (.719) as starter in Dec. Has 28,866 career passing yards, most in Steelers annals. Has 3-1 record vs. SD. QB CHARLIE BATCH is 6-3 as starter with Pit. Registered 25th career win as starter last week. RB JONATHAN DWYER posted 1st rush TD of career last week…WR EMMANUEL SANDERS has career-high in receptions (34) & yards (489) in ’12…TE HEATH MILLER (393) needs 7 receptions to become 3rd Steeler to reach 400 career. Has 7 TD receptions in ’12, tied for most in career (7 in ’07). Has 3 TDs in 3 games vs. SD…Defense allows NFL-low 259.8 yards per game in ’12…In 4 career games vs. SD, LB JAMES HARRISON has 3 sacks, 2 INTs & 2 FFs. Harrison has (62) 2nd-most sacks by Steeler since sacks became official statistic in 1982 (JASON GILDON, 77). …DE BRETT KEISEL has 3 sacks in past 3…S RYAN CLARK posted 2nd INT of season last week…LB LARRY FOOTE leads team with 84 tackles…K SHAUN SUISHAM has registered game-winning FGs in Steelers’ past 2 wins.